People accused Kim Kardashian of Photoshop in this mirror selfie.

The door frame appears to bend right around where she might want to make her stomach look flatter.

A representative for Kardashian later denied the image was altered, and Kardashian herself said she's "just trying to motivate others & show anyone struggling with weight they can totally achieve whatever they want if they are dedicated."

Britney Spears looks great, and she often shows it off on Instagram.

But commenters noticed that you can't see the pool behind her back arch.

It makes it seem like the arch was digitally expanded, instead of being her actual pose.

For what it's worth, Spears doesn't seem to have an issue with Photoshopping.

"There's so much they can do with computers to make people look a certain way," she told Ryan Seacrest. "So, when I'm waiting for them to take a picture, I'm like, 'I might as well eat six pieces of pizza.'"